Hi again
I've found this compound, an I think it will be good to make the bushes!
Oops. Wrote my post below from my iPhone and I coud not scroll to the bottom so my text got inserted in the quote above. But now I have cut it out and pasted it below.
Unless the compound has the same "shore" value as the original, i would not use it.
A different value changes the stiffnes and range of flex, thus changing the geometry of the suspension under load.
As Anders say, it is not adviced.